当たるも八卦当たらぬも八卦
Meanings
1
a prediction may or may not come true; only god knows what will happen
Proverb used to express that the outcome of a prediction or fortune-telling is uncertain; often said when taking a chance or making a guess.
Fortune-telling is a hit-or-miss thing, you know.
Nothing ventured, nothing gained—let's just apply and see what happens.